CVE-2025-54097 in Windows
Summary
by MITRE • 09/09/2025
Out-of-bounds read in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to disclose information over a network.
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Analysis
by VulDB Data Team • 09/12/2025
The vulnerability identified as CVE-2025-54097 represents a critical out-of-bounds read flaw within the Windows Routing and Remote Access Service component that forms part of the broader Windows operating system ecosystem. This issue specifically affects the remote access functionality that enables users to establish connections to remote networks through various protocols including point-to-point protocol and l2tp. The vulnerability resides in the service's handling of network packets and connection management processes where insufficient input validation leads to memory access violations. The RRAS service operates with elevated privileges and serves as a cornerstone for enterprise network connectivity, making this flaw particularly dangerous in corporate environments where remote access is extensively utilized.
The technical implementation of this vulnerability stems from inadequate bounds checking within the packet processing routines of the routing and remote access service. When the RRAS service receives malformed or specially crafted network traffic, it fails to properly validate the boundaries of memory allocations before accessing data structures. This allows an attacker positioned on the network to send specifically crafted packets that trigger the service to read memory locations beyond the intended buffer boundaries. The flaw manifests as an information disclosure vulnerability because the out-of-bounds read can expose sensitive data from memory including credentials, session information, and potentially system configuration details that should remain protected. This type of vulnerability aligns with CWE-125 which describes out-of-bounds read conditions and represents a classic example of memory safety issues that have plagued network services for decades.
The operational impact of this vulnerability extends significantly beyond simple information disclosure, as it provides attackers with potential footholds for further exploitation within network environments. An unauthorized attacker who successfully exploits this vulnerability can gain access to confidential information that may include authentication tokens, network configuration parameters, and other sensitive data that could facilitate privilege escalation or lateral movement within the compromised network. The attack vector requires only network access to the target system, making it particularly dangerous for organizations with exposed remote access services. This vulnerability is especially concerning in environments where RRAS is configured to accept connections from untrusted networks or where the service is exposed to the internet without proper network segmentation. The potential for this vulnerability to be leveraged in combination with other exploits makes it a critical concern for enterprise security teams managing remote access infrastructure.
Organizations should implement immediate mitigations including applying the vendor-provided security patches as soon as they become available, configuring network segmentation to limit access to RRAS services, and implementing network monitoring to detect anomalous traffic patterns that may indicate exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies for critical network services. Security teams should also consider implementing intrusion detection systems that can identify the specific packet patterns associated with this vulnerability and conduct regular vulnerability assessments of remote access infrastructure. From an ATT&CK framework perspective, this vulnerability maps to technique T1046 for network service scanning and T1071 for application layer protocol usage, while also supporting potential lateral movement activities once information has been successfully extracted. The vulnerability highlights the ongoing need for robust memory safety practices in network service implementations and serves as a reminder of the critical importance of secure coding practices in system components that handle untrusted network input.